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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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Group of geodes from the Upper Keokuk, Keokuk, Iowa, late 1890s or early 1900s
Group of people, buildiings and railroad tracks at the base of a mountain, Silver Plume, Colo., late 1890s or early 1900s
Group photo from the International Geological Conference, Canada, 1913
Heaving of ice along margin of Clear Lake, Iowa, late 1890s or early 1900s
Hertha Limestone located about 200 feet west of Iron Bridge and south of Squaw Creek, Osceola Township, Iowa, late 1890s or early 1900s
Located in Osceolo Twp., about 200 feet West of Iron Bridge, South of Squaw Creek, in the NW 1/4 of the NW 1/4 of section 6.
High cliff in the Upper Palisades, Cedar River, Mount Vernon, Iowa, late 1890s or early 1900s
Hill above New Albin, Minn., late 1890s or early 1900s
Picture taken from Iron Monument marking boundary between Iowa and Minnesota.
Hill formed by circumdenudation with base of leveled plain composed of St. Croix overlain by Oneota limestone, Iowa, late 1890s or early 1900s
Located in Twp. 100, R. V. Sec. 34, N. E. Gr.; south side of Oneota River.
Hill in Webster County, Iowa, late 1890s or early 1900s
Hill of Kansan Drift in wall of valley of Iowa River, Belle Plaine, Iowa, late 1890s or early 1900s
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